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PDF 39A108 Data sheet ( Hoja de datos )
| Número de pieza | 39A108 | |
| Descripción | MB39A108 | |
| Fabricantes | Fujitsu Media Devices | |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27237-2E
ASSP for Power Supply Applications
(DC/DC converter for DSC/camcorder)
5 ch DC/DC Converter IC with
Synchronous Rectification
MB39A108
■ DESCRIPTION
The MB39A108 is 5-channel DC/DC converter IC using pulse width modulation (PWM), and is suitable for up
conversion, down conversion, and up/down conversion. The MB39A108 is built in 5 channels into TSSOP-38P/
BCC-40P package and operates at 2 MHz maximum. Each channel can be controlled with soft-start.
The MB39A108 is suitable for power supply of high performance portable instruments such as DSC.
■ FEATURES
• Supports for down-conversion with synchronous rectification (CH1)
• Supports for down-conversion and up/down Zeta conversion (CH2, CH3)
• Supports for up-conversion and up/down Sepic conversion (CH4, CH5)
• Low voltage start-up (CH4, CH5) : 1.7 V
• Power supply voltage range : 2.5 V to 11 V
• Reference voltage : 2.0 V ± 1%
• Error amplifier threshold voltage : 1.00 V ± 1% (CH1), 1.23 V ± 1% (CH2 to CH5)
• Oscillation frequency range : 200 kHz to 2.0 MHz
www.DataSh•eeSt4taUn.cdobmy current : 0 µA (Typ)
• Built-in soft-start circuit independent of loads
• Built-in totem-pole type output for MOS FET
• Short-circuit detection capability by external signal ( − INS terminal)
• Two types of package (TSSOP-38 pin : 1 type, BCC-40 pin : 1 type)
■ APPLICATIONS
• Digital still camera (DSC)
• Digital video camera (DVC)
• Surveillance camera
etc.
Copyright©2005-2006 FUJITSU LIMITED All rights reserved
1 page  
MB39A108
(Continued)
Pin No.
Block
PKG
Pin name I/O
TSSOP BCC
Description
6 2 CTL I Power supply control terminal.
7 3 CTL3 I CH3 control terminal.
Control
8
9
15
10
35
5
4 CTL4 I CH4 control terminal.
5 CTL5 I CH5 control terminal.
11 CSCP ⎯ Short-circuit detection circuit capacitor connection terminal.
6
− INS
I Short-circuit detection comparator inverted input terminal.
32 VCCO ⎯ Drive output block power supply terminal.
1
VCC
⎯ Power supply terminal.
Power
11
28
14
7 VREF O Reference voltage output terminal.
25 GNDO ⎯ Drive output block ground terminal.
10
GND
⎯ Ground terminal.
Note : The terminal number which has been described in the text is the one of the TSSOP-38P package after this.
www.DataSheet4U.com
5
5 Page 
MB39A108
(Continued)
( VCC = VCCO = 4 V, Ta = + 25 °C)
Parameter
Symbol Pin No.
Conditions
Value
Unit
Min Typ Max
PWM compara-
tor block (CH1)
[PWM Comp.1]
Threshold
voltage
VT0
VT100
33, 34 Duty cycle = 0%
33, 34 Duty cycle = 100%
0.35 0.4 0.45 V
0.85 0.9 0.95 V
PWM compara- Threshold
tor block
voltage
(CH2 to CH5)
[PWM Comp.2 to Maximum
PWM Comp.5] duty cycle
VT0
VT100
Dtr
29 to 32 Duty cycle = 0%
29 to 32 Duty cycle = 100%
29 to 32
CT = 100 pF,
RT = 6.8 kΩ
0.35 0.4 0.45 V
0.85 0.9 0.95 V
85 90 95 %
Output source
current
ISOURCE
Duty ≤ 5%
29 to 34 (t = 1/fosc × Duty)
OUT = 0 V
⎯ − 130 − 75 mA
Output block
(CH1 to CH5)
Output sink
current
[Drive1 to Drive5] Output on
resistor
Duty ≤ 5%
ISINK 29 to 34 (t = 1/fosc × Duty)
OUT = 4 V
ROH 29 to 34 OUT = − 15 mA
ROL 29 to 34 OUT = 15 mA
75 130 ⎯ mA
⎯ 18 27 Ω
⎯ 18 27 Ω
Dead time
tD1 33, 34 OUT2 − OUT1
tD2 33, 34 OUT1 − OUT2
⎯ 50* ⎯ ns
⎯ 50* ⎯ ns
Short-circuit
detection block
[SCP Comp.]
Threshold
voltage
Input bias
current
VTH 34
⎯
IB 10 − INS = 0 V
0.97 1.00 1.03 V
− 25 − 20 − 17 µA
Output on
Control block
condition
w w w . D(CaTtLa, CSThLe3 etot 4 UO.uctpoumt off
CTL5)
condition
VIH 6, 7 to 9 CTL, CTL3 to CTL5
VIL 6, 7 to 9 CTL, CTL3 to CTL5
1.5 ⎯ 11 V
0 ⎯ 0.5 V
[CTL, CHCTL]
ICTLH 6, 7 to 9 CTL, CTL3 to CTL5 = 3 V 5
30 60 µA
Input current
ICTLL 6, 7 to 9 CTL, CTL3 to CTL5 = 0 V ⎯
⎯
1 µA
General
Standby
current
Power supply
current
ICCS
ICCSO
ICC
5 CTL, CTL3 to CTL5 = 0 V ⎯
35 CTL = 0 V
⎯
5 CTL = 3 V
⎯
0
0
4
2 µA
1 µA
6 mA
* : Standard design value
11
11 Page | ||
| Páginas | Total 45 Páginas | |
| PDF Descargar | [ Datasheet 39A108.PDF ] | |
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